ACR-2726A- 2-Channel VHF GMDSS survival craft radio Transmits and receives on VHF Channels 16 and 6 Capable of withstanding total immersion to 10 ft. (3.3 m) Floats to prevent being lost overboard like other radios Can be stored in a survival craft for up to 5 years Easily replaceable "push/twist/lock" battery; 5 year replacement life Operating life: 8 hours @ -20° C (-4° F), longer in temperate waters